Keyboard instrument



FIG. 1 is a front, left, and top perspective view of a keyboard instrument, showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front and top perspective view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken line portion of the figure drawings is included to show the boundary of the article and form no part of the claimed design. 

CLAIM The ornamental design for a keyboard instrument, as shown and described. 